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<h1 class="entry-title" itemprop="headline" ><a href="https://sreweekly.com/sre-weekly-issue-148/">SRE Weekly Issue #148</a></h1>
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<div class="entry-date" itemprop="datePublished" >
<i class="genericon genericon-day"></i><a class="updated" href="https://sreweekly.com/sre-weekly-issue-148/">November 18, 2018</a>
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<a href="https://sreweekly.com/sre-weekly-issue-148/" title="Permalink to SRE Weekly Issue #148" class="email_only">View on sreweekly.com</a>
<div class="sreweekly-sponsor-message" style="border: 1px solid #b0b0b0; padding-left: 1rem; padding-right: 1rem; width: 80%; align: center; margin: 2rem auto 2rem auto;">
<h2 style="text-align: center; font-size: 80%; color: #909090;">A message from our sponsor, VictorOps:</h2>
<p>In case you don’t know the actual numbers, the costs of downtime can be pretty extreme. The benefits of SRE not only extend to system reliability and deployment speed, but it also creates a lot of business value:</p>
<p><a href="http://try.victorops.com/sreweekly/costs-of-downtime">http://try.victorops.com/sreweekly/costs-of-downtime</a></p>
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<h2>Articles</h2>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://www.pagerduty.com/blog/open-sourcing-incident-response-training/" target="_blank">Open-Sourcing Our Incident Response Training</a></div>
<div class="sreweekly-description">
<p>Last year, PagerDuty shared their inident response documentation. Now they&#8217;ve posted their training materials as well!</p>
<p><small>PagerDuty</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://blogs.dropbox.com/tech/2018/10/validating-performance-and-reliability-of-the-new-dropbox-search-engine/" target="_blank">Validating performance and reliability of the new Dropbox search engine</a></div>
<div class="sreweekly-description">
<p>Dropbox&#8217;s write-heavy read-light usage pattern makes this architecture overview worth a read.</p>
<p><small>Diwaker Gupta — Dropbox</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://blog.acolyer.org/2018/11/16/overload-control-for-scaling-wechat-microservices/" target="_blank">Overload control for scaling WeChat microservices\</a></div>
<div class="sreweekly-description">
<blockquote><p>There are two reasons to love this paper. First off, we get some insights into the backend that powers WeChat; and secondly the authors share the design of the battle hardened overload control system DAGOR that has been in production at WeChat for five years.</p></blockquote>
<p><small>Adrian Colyer — The Morning Paper (review and summary)<br />
</small></p>
<p><small>Zhou et al. (original paper)</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://launchdarkly.com/blog/the-time-our-provider-screwed-us/" target="_blank">The Time Our Provider Screwed Us</a></div>
<div class="sreweekly-description">
<p>A tale of a nearly business-ending security incident and outage. Transparency and solid incident management helped them survive the event and prosper.</p>
<p><small>Paul Biggar</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://blog.travis-ci.com/2018-10-31-travis-loves-honeycomb" target="_blank">How Honeycomb Has Changed the Way Travis CI Operates Their Business</a></div>
<div class="sreweekly-description">
<p>The section titled &#8220;A surprising discovery&#8221; is really thought-provoking:</p>
<blockquote><p>t turns out that a single (bot) user was sending us a lot of traffic to a particularly slow endpoint. So while this was impacting the p99 latency, it was in fact not impacting any other users.</p></blockquote>
<p><small> Igor Wiedler — Travis CI</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://ayende.com/blog/185057-C/analyzing-the-github-outage" target="_blank"> Analyzing the GitHub outage</a></div>
<div class="sreweekly-description">
<p>An (external) analysis of the GitHub outage, with a discussion of how Orchestrator reacts to a network partition.</p>
<p><small>Ayende Rahien </small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://jvns.ca/blog/2018/11/11/understand-the-software-you-use-in-production/" target="_blank">Some notes on running new software in production</a></div>
<div class="sreweekly-description">
<blockquote><p>I’m working on a talk for kubecon in December! One of the points I want to get across is the amount of time/investment it takes to use new software in production without causing really serious incidents, and what that’s looked like for us in our use of Kubernetes.</p></blockquote>
<p><small>Julia Evans</small></p>
</div>
</div>
<h2>Outages</h2>
<ul class="sreweekly-outages">
<li><a href="https://status.cloud.google.com/incident/cloud-networking/18018">Google Cloud Platform (and possibly CloudFlare)</a>
<ul class="sreweekly-outage">
<li class="sreweekly-outage">The big outage this week occurred when an ISP in Africa accidentally advertised one of Google&#8217;s IP blocks over BGP, effectively black-holing traffic originally destined for GCP. <a href="https://www.datacenterdynamics.com/news/gcp-outage-mainone-leaked-google-cloudflare-ip-addresses-china-telecom/">This article</a> suggests that CloudFlare might also have been affected, and it includes a statement from the offending ISP&#8217;s CEO.</li>
</ul>
</li>
<li><a href="https://www.windowslatest.com/2018/11/16/microsoft-outlook-is-down-november-2018/">Microsoft Outlook</a></li>
<li><a href="https://deadline.com/2018/11/instagram-has-fixed-its-temporary-outage-password-problems-1202504302/">Instagram</a></li>
<li><a href="https://hub.packtpub.com/basecamp-3-faces-a-read-only-outage-of-nearly-5-hours/">Basecamp 3</a></li>
<li><a href="https://community.secondlife.com/blogs/entry/2446-grey-avatars-and-clouds/">Second Life</a></li>
<li><a href="https://status.heroku.com/incidents/1655">Heroku followup report: Incident #1655 (October 30)</a></li>
<li><a href="https://www.usatoday.com/story/tech/talkingtech/2018/11/12/facebook-goes-down-sending-users-rushing-twitter/1978179002/">Facebook</a></li>
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